<template>
    <div class="login_container">
        <div class="login_box">
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
        <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
            <el-form-item prop="username">
                <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
            <el-form-item prop="password">
                <el-input type="password" v-model="loginForm.password" prefix-icon="iconfont icon-3702mima"></el-input>
            </el-form-item>
            <el-form-item class="btns">
                <el-button type="primary" @click="login">登录</el-button>
                <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
        </el-form>
        </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    //   点击重置按钮，重置登陆表单
    resetLoginForm () {
      // console.log(this);
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        console.log(valid)
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败!')
        this.$message.success('登陆成功')
        // 1.将登陆成功后的 TOKEN ,保存到客户端的 sessionStorage中
        // 1.1项目中除了登录之外的API接口，必须在登陆之后还能访问
        // 1.2token只应在当前网站打开期间生效，所以将 token 保存在sessionStorage中
        console.log(res)
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程使导航跳转到后台主页，路由地址是/home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
    background-color:  #2b4b6b;
    height: 100%;
}
.login_box{
    width:450px;
    height:300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    .avatar_box{
        height:130px;
        width:130px;
        border:1px solid #eee;
        border-radius:50%;
        padding:10px;
        box-shadow:0 0 10px #ddd;
        position:absolute;
        left:50%;
        transform:translate(-50%,-50%);
        background-color:white;
        img{
            width:100%;
            height:100%;
            border-radius:50%;
            background-color:#eee;
        }
    }
}
.login_form{
    position:absolute;
    bottom: 0;
    width:100%;
    padding:0 20px;
    box-sizing:border-box;
}
.btns {
    display: flex;
    justify-content: flex-end;
}
</style>
